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HSTS Missing From HTTPS Server | Resolved

Did you know that the “HSTS Missing From HTTPS Server” error message means that your site is vulnerable to attacks?

Fortunately, our experts have put together this guide to help you resolve this error.

The above error message indicates that the HSTS response header and command are missing from the webserver’s response. HSTS is responsible for providing end-to-end secure web browsing and website session to web users. In fact, the missing HSTS error message is a concern for web security as well as user privacy.

Now, let’s take a look at how to resolve this issue:

1. First, we have to take a manual backup of the site.
2. Then, obtain a certificate from either Let’s Encrypt or a trusted certificate authority and then install it.
3. Next, we have to enable HTTPS on the website. This involves configuring the web server software to use HTTPS and redirect HTTP traffic to HTTPS.
4. After that, we have to set the HSTS header to ensure that web browsers only access over website over a secure HTTPS connection. This is done by adding the following line to your website’s HTTP response headers:

   Strict-Transport-Security: max-age=31536000; includeSubDomains; preload

   This informs the browser to cache the HSTS policy for a year and to include all subdomains as well as preload the policy into the browser’s HSTS preload list.
5. Finally, we have to test the website with an online tool like SSL Labs’ SSL Server Test to verify the website’s SSL/TLS configuration and HSTS policy.

Let us know in the comments if you need further help to resolve the HSTS Missing error.

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Conclusion

In summary, our Support Techs demonstrated how to resolve the HSTS Missing From HTTPS Server error.